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Old 02-02-2008, 09:47 PM   #1 (permalink)
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Bleeding air from cooling system!!!

I have a 2000 RMK 800 and i just rebuilt the engine. Can't seem to get the air out of the coolant system. I have tried everything. (i raised the front, the back, the left and the right) Is there any way to check that the water pump is working? I checked that the t-stat is working and it is opening o.k. i even took that out (and raised the front, the back, the left and the right)still can't get the antifreeze flowing through the system. what else is there to try? how to you flush the system? i was thinking of disconnecting the hoses at the rear and connecting up a pump and pumping antifreeze through the system, could this work??
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Old 02-03-2008, 12:36 AM   #2 (permalink)
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Mine is very hard to get all the air out but what i do is let it idle really low, raise the front really high and just let it idle until it starts shooting antifreeze out the bleed screw. Once is does that then put you bleed screw back in but not all the way let id idle till no more bubbles come out. I feel you r pain though when i first got my sled i didnt know anything about it andit had an airlock. Over time i worked on it by myself and with the help of all these guys you can get to be pretty good at fixing these things.
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Old 02-03-2008, 12:40 AM   #3 (permalink)
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Quote:
Originally Posted by RMK800
I have a 2000 RMK 800 and i just rebuilt the engine. Can't seem to get the air out of the coolant system. I have tried everything. (i raised the front, the back, the left and the right) Is there any way to check that the water pump is working? I checked that the t-stat is working and it is opening o.k. i even took that out (and raised the front, the back, the left and the right)still can't get the antifreeze flowing through the system. what else is there to try? how to you flush the system? i was thinking of disconnecting the hoses at the rear and connecting up a pump and pumping antifreeze through the system, could this work??
You may have a broken water pump belt, it's known to happen. The water pump shaft runs the oil pump, too. To check, remove the oil pump (two bolts), look into the opening and see if the shaft turns when you turn the clutch by hand.
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Old 02-03-2008, 06:33 AM   #4 (permalink)
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I ran the ski-doo up a snow bank and alot of steam and air is coming out but can't run the ski-doo for very long, it runs hot in minutes then have to shut it down. will give it another try, i heard it was hard to get the air but not this hard. thanks
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Old 02-03-2008, 06:50 AM   #5 (permalink)
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I was thinking the same thing, the water pump shaft is turning when the ski-doo is turning over. took off the oil pump and removed the spark plugs and watched the shaft turn as the ski-doo was being halled over. can only run the ski-doo for a few minutes then it gets really hot and have to shut it down. there is alot of steam and air coming out of the bleed screw. i ran it up a snow bank then down, left and right. i must of done that a dozen times and still can't get the air out. should it be this hard to get the air out?
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Old 02-03-2008, 11:57 PM   #6 (permalink)
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You may have a bad water pump impeller or possibly the nut that holds the water pump impeller on is loose, letting the impeller spin without moving very much water. Could also be an exhaust leak into the coolant system, from bad head o-rings or base gaskets, or even a cracked cylinder...
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Old 02-06-2008, 10:14 AM   #7 (permalink)
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I was thinking the impeller wasn't working right but i can remember that i tighten the nut up. that will be one of the last things i look at. i can see air moving through the system through a clear T thats in the line. When i rebuilt the engine i replaced all the gaskets and o-rings. had the crank rebuilt, base and cylinders inspected. I am starting to think that maybe the head gasket was the wrong one or that i had to cut out some holes to fit the engine, would this be possible?
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Old 02-11-2008, 05:30 PM   #8 (permalink)
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Still can't get the air out of the cooling system. i checked the water pump its working ok. i ran the ski-doo up a snow bank and let it idle but i can't run the ski-doo to long it gets hot fast. at one point it ran that hot that the rings stuck, this can't be good. do i have to run the ski-doo with the t-stat in or out?
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Old 02-12-2008, 03:39 AM   #9 (permalink)
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You could blow in the coolant resivoir. Just open the bleed screw up. But i think somthing more serious is going on than an air-lock. It should not be getting that hot tht fast.
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Old 12-28-2008, 01:02 AM   #10 (permalink)
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same exact problem

imi in the same boat as you man 93 cat 530 can not get the air out. if u find a cure let me know please
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Old 12-28-2008, 05:57 AM   #11 (permalink)
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How to?

Quote:
Originally Posted by new2sleds View Post
imi in the same boat as you man 93 cat 530 can not get the air out. if u find a cure let me know please
Isn`t there a "How too" in these forums? Is has to be a right/only way to do it. My local technician says you have to get the front up high to get air of system. nor back or sideways. Only up. the air shall press itself through the air-screw. After idle you got to check that there enough coolant fluid on the expansion tank. Refill if necessary. Irnnorth explain this very well.

To RMK 800. Do you install a temp-gauge set to your machine?. Its important that the coolant fluid run easy inside the hoses through the splice adapter. The temp sensor may block fluid running easy.
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Old 12-28-2008, 08:34 AM   #12 (permalink)
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did you bleed the oil system???? Jeez I hope you are getting oil in the motor :0
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Old 12-28-2008, 09:10 AM   #13 (permalink)
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i know that there is a air evac kit that they use on cars that hooks into where the cap goes. its run off an air compressor and sucks all the air out and sucks in the hoses and will suck coolant in when air is all out...i have one and it works great at my job when i install cabs and such with heaters. just an idea.
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Old 02-15-2009, 07:11 AM   #14 (permalink)
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Had the engine apart again and found that exhaust air was getting into the coolant system through the heads. this caused an air lock and the coolant could not flow. torqued down the head and the coolant is now flowing good. now just got to get the ooil pump working again, lots of fun....
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